<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>留言板</title>
    <style>
        .container {
            width: 350px;
            height: 300px;
            margin: 0 auto;
            /* border: 1px black solid; */
            text-align: center;
        }

        .grey {
            color: grey;
        }

        .container .row {
            width: 350px;
            height: 40px;

            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .container .row input {
            width: 260px;
            height: 30px;
        }

        #submit {
            width: 350px;
            height: 40px;
            background-color: orange;
            color: white;
            border: none;
            margin: 10px;
            border-radius: 5px;
            font-size: 20px;
        }
    </style>
</head>

<body>
    <div class="container">
        <h1>留言板</h1>
        <p class="grey">输入后点击提交, 会将信息显示下方空白处</p>
        <div class="row">
            <span>谁:</span> <input type="text" name="" id="from">
        </div>
        <div class="row">
            <span>对谁:</span> <input type="text" name="" id="to">
        </div>
        <div class="row">
            <span>说什么:</span> <input type="text" name="" id="say">
        </div>
        <input type="button" value="提交" id="submit" onclick="submit()">
        <!-- <div>A 对 B 说: hello</div> -->
    </div>

    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.4/jquery.min.js"></script>
    <script>
        $.ajax({
            url: "/message/getList",
            type: "get",
            success: function (messages) {
                for (let message of messages) {
                    let div = "<div>" + message.from + " 对 " + message.to + " 说 " + message.message;


                    $(".container").append(div);
                }


            }


        });

        function submit() {
            let from = $("#from").val();
            let to = $("#to").val();
            let say = $("#say").val();

            if (from == "" || to == "" || say == "") {
                return;
            }
            $.ajax({
                url: "/message/publish",
                type: "post",
                contentType: "application/JSON",
                data: JSON.stringify({
                    "from": from,
                    "to": to,
                    "message": say
                }),

                success: function (result) {
                    if (result) {
                        //成功
                        //不为空
                        let message = "<div>" + from + "对" + to + "说:" + say + "</div>"
                        $(".container").append(message);
                        //清空输入信息
                        $("#from").val("");
                        $("#to").val("");
                        $("#say").val("");

                    } else {
                        //失败
                        alert("sb")
                    }
                }
            });
        }



    </script>
</body>

</html>